Reaction Time Test
Wait for the screen to turn green, then click as fast as you can. Five tries give you a reliable average.
How the reaction time test works
Click the box to begin. It turns red, and after a random delay between one and four and a half seconds it turns green. Click the moment you see green. The test measures the time between the colour change and your click in milliseconds, repeats five times and shows your average — a much fairer number than a single lucky try.
What your number means
A typical result on a desktop with a standard monitor is about 250 ms. Competitive gamers often average 180–200 ms. Part of every result is hardware delay: a 60 Hz screen can add up to 16 ms, and wireless or budget mice can add more. For the most accurate number, use a high refresh rate display — you can check yours with the refresh rate test — and see how lag adds up with the input lag calculator.
Then put your reflexes to work: try the CPS test, the flick aim trainer or a quick round of Snake.
Frequently asked questions
What is a good reaction time?
The typical visual reaction time on this kind of test is around 250 milliseconds. Under 220 ms is quick, under 180 ms is excellent, and consistent results under 150 ms are very rare.
Why do my results change between tries?
Reaction time naturally varies with attention, fatigue and anticipation. That is why the test averages five tries and ignores clicks that come too early.
Does my monitor or mouse affect the result?
Yes. Screen refresh rate, input lag and mouse latency can add 10 to 50 ms. A 144 Hz or faster monitor and a wired mouse give the most accurate numbers.
What happens if I click too early?
Clicking before the screen turns green counts as a false start. That try is not recorded and you simply try again.
Can I use the keyboard?
Yes. Press Space or Enter instead of clicking.
How can I improve my reaction time?
Get enough sleep, warm up for a few minutes, keep your eyes on the centre of the box and stay relaxed. Regular practice in fast games also helps.